If you are experiencing stuttering or poor quality when casting your Android screen, follow the steps below:

1. The Android device and Chromecast device should be within ~15 feet (4 meters) of each other. The Chromecast or TV with Chromecast built-in should be ~15 feet (4 meters) away from the router, or less.
2. Make sure both your Chromecast device and Android device are both connected to the same Wi-fi network channel, either 2.4GHz or 5GHz.
3. All devices running Android 4.4.2 or higher support the Cast screen feature. However, these Android devices have been tested to work best for Android screen casting. Other Android devices may not have the necessary power to provide an optimized screen casting experience.